3x-2.5=x; 3/4y-1=1/2y; 0,7z=0,5z+3СРОЧНО!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Question

3x-2.5=x; 3/4y-1=1/2y; 0,7z=0,5z+3
СРОЧНО!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

1.3x-2,5=x
3x-x=2,5
2x=2,5
x=2,5:2
x=1,25
3.0,7z=0,5z+3
0,7z-0,5z=3
0,2z=3
z=3:0,2
z=15

Answer 2

3/4у-1=1/2у
3/4у-1-1/2у=0
3/4у-1-2/4у=0
1/4у-1=0
1/4у=1
у=1:1/4
у=4